package collection;

import java.util.ArrayList;
import java.util.Collection;

/**
 * 集合间的操作:
 */
public class CollectionDemo4 {
    public static void main(String[] args) {
        //addAll
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".next");
        System.out.println("c1:"+c1);

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);
        System.out.println("c2:"+c2);
        System.out.println("c1:"+c1);

        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        boolean containall = c1.containsAll(c3);//判断c1是否包含c3的所有元素
        System.out.println(containall);//false

        /*
        //取交集 获取c1和c3共有的元素 c3不变
        c1.retainAll(c3);
        System.out.println("c1:"+c1);//c1:[c++, android]
        System.out.println("c3:"+c3);//c3:[c++, android, php]
         */

        //删交集  删除c1和c3共有的元素 c3不变
        c1.removeAll(c3);
        System.out.println("c1:"+c1);//c1:[java, .next, ios, java]
        System.out.println("c3:"+c3);//c3:[c++, android, php]


    }
}
